I was recently counting my blessings when Denis Noble, author of 'Dance to the Tune of Life: Biological Relativity,' agreed for me to interview him, because I am very interested in his perspective on physiology. To my surprise, he put me in touch with Perry Marshall, author of 'Evolution 2.0,' and they both agreed to talk with me about the ongoing excitement around questions of information and purpose that are driving our understanding of evolution theory to a new level. Not one to miss!